Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Mixed Review - Page 756: 76

Answer

$x= 1.464, -5.464$

Work Step by Step

$x^2+4x-8=0$ $x=(-b±\sqrt {b^2-4ac})/2a$ $x=(-4±\sqrt {4^2-4*1*-8})/2$ $x=(-4±\sqrt {16+32})/2$ $x=(-4±\sqrt {48})/2$ $x=(-4±4\sqrt {3})/2$ $x=(-2±2\sqrt {3})$ $x=(-2±2*1.732)$ $x=(-2±3.464)$ $x=(-2+3.464)$ $x=1.464$ $x=(-2-3.464)$ $x=-5.464$
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